Use

By pressing up on the d-pad, you can sacrifice health to create 5 Bullets.

Farming

Players can farm up to almost 30 bullets, per run, by doing the following method:

Equip your strongest weapon. Players must be able to kill the Huntsmen in a single strike, and weapons with sweeping attacks are recommended. Also, equip a Pistol and the Monocular.

In case players cannot kill the Huntsman in a single strike, equip Molotov Cocktails, players can also use any Moon Runes they have to boost echoes from killing these hunters and so they can buy more Molotovs.

Kill the Huntsman between two trees, on the left, then move to the next tree and stand between it and the tombstone on the left.

There will be a Huntsman firing at you from your right who is completely surrounded by explosive urns.

Use the Monocular to shoot at the right most urn, you will have to move to the side to get a line of sight on the urns (you may also just throw a Molotov and be done with it this way).

As soon as the urns explode, hide as fast possible between the tree and the tombstones nearest to you, as ALL the nearby Huntsman will investigate the explosion. Some dogs will also be attracted by the noise.

Now, either flank and rush them with your weapon, or throw Molotovs at them.

Once they all die collect their drops and repeat the process as deemed necessary.

Notes

The Formless Oedon rune can increase the carry capacity of Quicksilver Bullets. The three best runes will, in total, add 12, allowing players to carry a whopping 32 Quicksilver Bullets.